/* roulang page: index */
:root{
      --primary:#2563eb;
      --primary-dark:#1d4ed8;
      --primary-soft:#dbeafe;
      --sky:#0ea5e9;
      --sky-soft:#e0f2fe;
      --amber:#f59e0b;
      --amber-soft:#fef3c7;
      --bg:#f8fafc;
      --bg-soft:#f1f5f9;
      --surface:#ffffff;
      --text:#0f172a;
      --muted:#475569;
      --subtle:#64748b;
      --line:#e2e8f0;
      --line-blue:rgba(37,99,235,.24);
      --radius-sm:12px;
      --radius-md:18px;
      --radius-lg:24px;
      --radius-xl:32px;
      --shadow:0 12px 32px rgba(15,23,42,.06);
      --shadow-hover:0 18px 44px rgba(37,99,235,.12);
      --container:1200px;
      --ease:all .24s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 0%, rgba(37,99,235,.10), transparent 30%),
        radial-gradient(circle at 95% 15%, rgba(14,165,233,.10), transparent 34%),
        var(--bg);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img,svg{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    .site-container{width:min(var(--container), calc(100% - 40px));margin-inline:auto}
    .section{padding:92px 0}
    .section-sm{padding:72px 0}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;
      background:var(--sky-soft);color:#0369a1;
      font-size:13px;font-weight:700;letter-spacing:.01em;
      border:1px solid rgba(14,165,233,.18)
    }
    .eyebrow-dot{width:8px;height:8px;border-radius:50%;background:var(--sky);box-shadow:0 0 0 4px rgba(14,165,233,.12)}
    h1,h2,h3{letter-spacing:-.025em;color:var(--text)}
    h1{font-size:clamp(34px,5vw,54px);line-height:1.15;font-weight:800;margin:18px 0 18px}
    h2{font-size:clamp(28px,3.2vw,38px);line-height:1.25;font-weight:800;margin:0 0 16px}
    h3{font-size:21px;line-height:1.35;font-weight:750;margin:0 0 10px}
    p{margin:0;color:var(--muted)}
    .lead{font-size:18px;color:var(--muted);line-height:1.85}
    .text-subtle{color:var(--subtle)}
    .btn-brand,.btn-ghost,.btn-light-blue{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:12px 20px;border-radius:999px;
      font-weight:750;border:1px solid transparent;transition:var(--ease);
      box-shadow:none;white-space:nowrap
    }
    .btn-brand{background:linear-gradient(135deg,var(--primary),#2f6fed);color:#fff;box-shadow:0 12px 24px rgba(37,99,235,.18)}
    .btn-brand:hover,.btn-brand:focus{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;transform:translateY(-2px);box-shadow:0 18px 34px rgba(37,99,235,.22)}
    .btn-ghost{background:#fff;color:var(--primary);border-color:var(--line-blue)}
    .btn-ghost:hover,.btn-ghost:focus{background:#eff6ff;color:var(--primary-dark);transform:translateY(-2px);border-color:rgba(37,99,235,.42)}
    .btn-light-blue{background:var(--primary-soft);color:var(--primary)}
    .btn-light-blue:hover{background:#bfdbfe;color:var(--primary-dark);transform:translateY(-1px)}
    .btn-brand:focus,.btn-ghost:focus,.btn-light-blue:focus,.nav-link:focus,.form-control:focus,.form-select:focus,.accordion-button:focus{
      outline:3px solid rgba(37,99,235,.22);outline-offset:2px;box-shadow:none
    }
    .site-header{
      position:sticky;top:0;z-index:1000;
      background:rgba(255,255,255,.90);
      backdrop-filter:blur(18px);
      border-bottom:1px solid rgba(226,232,240,.85)
    }
    .navbar{min-height:76px;padding:12px 0}
    .brand-wrap{display:flex;align-items:center;gap:10px;min-width:0}
    .brand-icon{
      width:38px;height:38px;border-radius:14px;
      background:linear-gradient(135deg,var(--primary),var(--sky));
      display:grid;place-items:center;box-shadow:0 10px 24px rgba(37,99,235,.18);
      position:relative;overflow:hidden;flex:0 0 auto
    }
    .brand-icon:before,.brand-icon:after{content:"";position:absolute;background:rgba(255,255,255,.75);border-radius:4px}
    .brand-icon:before{width:18px;height:4px;top:12px;left:10px}
    .brand-icon:after{width:12px;height:12px;right:8px;bottom:8px;border-radius:50%;background:rgba(255,255,255,.55)}
    .brand-text{
      font-weight:850;color:var(--text);letter-spacing:-.02em;
      max-width:260px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis
    }
    .navbar-nav{gap:6px}
    .nav-link{
      color:var(--muted);font-size:15px;font-weight:700;
      padding:9px 14px!important;border-radius:999px
    }
    .nav-link:hover{color:var(--primary);background:#eff6ff}
    .nav-link.active{color:var(--primary);background:var(--primary-soft)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .command-search{
      height:42px;min-width:236px;border-radius:999px;
      background:var(--bg-soft);border:1px solid var(--line);
      display:flex;align-items:center;gap:9px;padding:0 10px 0 14px;
      color:var(--subtle);font-size:14px;transition:var(--ease)
    }
    .command-search:hover{border-color:var(--line-blue);background:#fff;box-shadow:0 10px 24px rgba(15,23,42,.05)}
    .kbd{
      margin-left:auto;border:1px solid var(--line);border-bottom-width:2px;
      background:#fff;border-radius:8px;padding:1px 7px;font-size:12px;color:var(--subtle);line-height:1.6
    }
    .navbar-toggler{border:1px solid var(--line);border-radius:14px;padding:8px 10px}
    .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(37,99,235,.18)}
    .hero{padding:84px 0 54px;position:relative}
    .hero:before{
      content:"";position:absolute;inset:0;z-index:-1;
      background-image:linear-gradient(rgba(37,99,235,.05) 1px, transparent 1px),linear-gradient(90deg, rgba(37,99,235,.05) 1px, transparent 1px);
      background-size:42px 42px;mask-image:linear-gradient(to bottom, #000, transparent 82%)
    }
    .hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:54px;align-items:center}
    .hero-copy{max-width:680px}
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
    .hero-note{display:flex;gap:10px;align-items:center;margin-top:20px;color:var(--subtle);font-size:14px}
    .check-dot{width:20px;height:20px;border-radius:50%;background:#dcfce7;color:#15803d;display:grid;place-items:center;font-weight:900;font-size:12px;flex:0 0 auto}
    .dashboard{
      background:rgba(255,255,255,.86);border:1px solid rgba(226,232,240,.94);
      border-radius:var(--radius-xl);box-shadow:0 24px 70px rgba(15,23,42,.10);
      padding:22px;position:relative;overflow:hidden
    }
    .dashboard:before{
      content:"";position:absolute;width:210px;height:210px;border-radius:50%;
      right:-80px;top:-80px;background:rgba(14,165,233,.12)
    }
    .dash-top{display:flex;gap:10px;align-items:center;position:relative}
    .dash-search{flex:1;background:var(--bg-soft);border:1px solid var(--line);height:44px;border-radius:999px;display:flex;align-items:center;padding:0 14px;color:var(--subtle);font-size:14px}
    .dash-badge{background:var(--amber-soft);color:#a16207;border:1px solid rgba(245,158,11,.22);border-radius:999px;padding:9px 12px;font-weight:800;font-size:12px}
    .tag-row{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}
    .tag{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:7px 11px;font-size:13px;font-weight:700;border:1px solid var(--line);background:#fff;color:var(--subtle)}
    .tag.blue{background:var(--primary-soft);border-color:rgba(37,99,235,.18);color:var(--primary)}
    .tag.cyan{background:var(--sky-soft);border-color:rgba(14,165,233,.18);color:#0369a1}
    .tag.amber{background:var(--amber-soft);border-color:rgba(245,158,11,.18);color:#a16207}
    .preview-list{display:grid;gap:12px;position:relative}
    .preview-item{
      display:grid;grid-template-columns:56px 1fr auto;gap:12px;align-items:center;
      padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line);
      transition:var(--ease)
    }
    .preview-item:hover{transform:translateY(-2px);border-color:var(--line-blue);box-shadow:var(--shadow)}
    .thumb{
      height:46px;border-radius:14px;background:
      linear-gradient(135deg,rgba(37,99,235,.18),rgba(14,165,233,.16)),
      repeating-linear-gradient(45deg,rgba(255,255,255,.75) 0 5px,transparent 5px 10px)
    }
    .line-lg,.line-sm{height:9px;border-radius:999px;background:var(--bg-soft)}
    .line-lg{width:86%;margin-bottom:8px}.line-sm{width:56%}
    .quality{font-size:12px;font-weight:850;color:var(--primary);background:var(--primary-soft);border-radius:999px;padding:5px 8px}
    .mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px;position:relative}
    .mini-stat{background:#f8fbff;border:1px solid var(--line);border-radius:18px;padding:14px}
    .mini-stat strong{display:block;font-size:22px;color:var(--text);line-height:1.1}
    .mini-stat span{font-size:12px;color:var(--subtle)}
    .trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:34px}
    .trust-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow)}
    .trust-card strong{display:block;font-size:24px;line-height:1.1;color:var(--primary);margin-bottom:6px}
    .trust-card span{font-size:14px;color:var(--subtle)}
    .section-heading{max-width:760px;margin-bottom:36px}
    .split-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:36px;align-items:start}
    .sticky-panel{
      position:sticky;top:104px;background:#fff;border:1px solid var(--line);
      border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow)
    }
    .problem-list{display:grid;gap:15px}
    .problem-card{
      display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);
      border-radius:22px;padding:22px;box-shadow:0 8px 28px rgba(15,23,42,.04);transition:var(--ease)
    }
    .problem-card:nth-child(even){transform:translateX(18px)}
    .problem-card:hover{transform:translateY(-3px);border-color:var(--line-blue);box-shadow:var(--shadow-hover)}
    .problem-card:nth-child(even):hover{transform:translate(18px,-3px)}
    .icon-pill{width:44px;height:44px;border-radius:16px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-weight:900;flex:0 0 auto}
    .bento{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
    .bento-card{
      background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;
      min-height:190px;box-shadow:var(--shadow);transition:var(--ease);position:relative;overflow:hidden
    }
    .bento-card:hover,.content-card:hover,.testimonial-card:hover{transform:translateY(-3px);border-color:var(--line-blue);box-shadow:var(--shadow-hover)}
    .bento-card.feature{background:linear-gradient(135deg,#eff6ff,#fff)}
    .bento-card.tall{grid-row:span 2}
    .feature-mark{
      width:48px;height:48px;border-radius:18px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--sky));color:#fff;font-weight:900;
      margin-bottom:18px;box-shadow:0 12px 24px rgba(37,99,235,.16)
    }
    .content-strip{background:linear-gradient(180deg,#fff,var(--bg-soft));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
    .result-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}
    .result-card strong{display:block;font-size:28px;color:var(--text);line-height:1;margin-bottom:8px}
    .result-card span{color:var(--subtle);font-size:14px}
    .flow-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:28px;overflow:hidden}
    .flow-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .flow-step{position:relative;padding:18px;border-radius:18px;background:#f8fbff;border:1px solid var(--line)}
    .step-num{width:30px;height:30px;border-radius:50%;background:var(--primary);color:#fff;font-weight:900;display:grid;place-items:center;margin-bottom:12px}
    .content-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px}
    .content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow);transition:var(--ease)}
    .meta-line{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 18px}
    .text-link{color:var(--primary);font-weight:800;display:inline-flex;align-items:center;gap:6px}
    .text-link:hover{color:var(--primary-dark);transform:translateX(3px)}
    .testimonial-wrap{background:linear-gradient(135deg,#eff6ff,#f8fafc);border-radius:var(--radius-xl);padding:34px;border:1px solid rgba(37,99,235,.12)}
    .testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .testimonial-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow);transition:var(--ease)}
    .avatar-row{display:flex;align-items:center;gap:12px;margin-bottom:16px}
    .avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary-soft),var(--sky-soft));display:grid;place-items:center;color:var(--primary);font-weight:900}
    .faq-shell{max-width:880px;margin:auto}
    .accordion{display:grid;gap:12px}
    .accordion-item{border:1px solid var(--line)!important;border-radius:20px!important;overflow:hidden;background:#fff;box-shadow:0 8px 24px rgba(15,23,42,.04)}
    .accordion-button{font-weight:800;color:var(--text);padding:20px 22px;background:#fff;border:0}
    .accordion-button:not(.collapsed){background:#eff6ff;color:var(--primary);box-shadow:none}
    .accordion-button::after{transition:transform .24s ease}
    .accordion-body{padding:0 22px 22px;color:var(--muted)}
    .cta-band{
      background:
        radial-gradient(circle at 12% 20%,rgba(255,255,255,.9),transparent 24%),
        linear-gradient(135deg,#dbeafe,#e0f2fe 55%,#fff);
      border:1px solid rgba(37,99,235,.16);border-radius:34px;
      padding:46px;display:grid;grid-template-columns:1fr auto;gap:26px;align-items:center;
      box-shadow:0 24px 64px rgba(37,99,235,.12);position:relative;overflow:hidden
    }
    .cta-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
    .site-footer{background:#eef4fb;border-top:1px solid var(--line);padding:56px 0 26px}
    .footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:34px;margin-bottom:34px}
    .footer-title{font-weight:850;margin-bottom:14px;color:var(--text)}
    .footer-links{display:grid;gap:10px}
    .footer-links a{color:var(--muted);font-weight:650}
    .footer-links a:hover{color:var(--primary);transform:translateX(3px)}
    .copyright{border-top:1px solid rgba(148,163,184,.35);padding-top:20px;color:var(--subtle);font-size:14px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
    @media (max-width:1199px){
      .hero-grid{gap:34px}
      .command-search{min-width:190px}
      .result-grid,.flow-steps{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:991px){
      .site-container{width:min(100% - 32px,var(--container))}
      .navbar-collapse{padding:16px 0 10px}
      .nav-actions{align-items:stretch;flex-direction:column;margin-top:12px}
      .command-search{width:100%;min-width:0}
      .hero{padding-top:56px}
      .hero-grid,.split-layout,.cta-band{grid-template-columns:1fr}
      .sticky-panel{position:static}
      .problem-card:nth-child(even),.problem-card:nth-child(even):hover{transform:none}
      .bento{grid-template-columns:1fr}
      .bento-card.tall{grid-row:auto}
      .trust-grid,.content-grid,.testimonial-grid,.footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:767px){
      .section{padding:64px 0}.section-sm{padding:54px 0}
      .hero-actions .btn-brand,.hero-actions .btn-ghost,.cta-band .btn-brand,.cta-band .btn-ghost{width:100%}
      .dashboard{padding:16px;border-radius:24px}
      .preview-item{grid-template-columns:46px 1fr}
      .preview-item .quality{grid-column:1/-1;width:max-content}
      .mini-stats,.trust-grid,.result-grid,.flow-steps,.content-grid,.testimonial-grid,.footer-grid{grid-template-columns:1fr}
      .cta-band{padding:30px 22px;border-radius:26px}
      .footer-grid{gap:24px}
    }
    @media (max-width:520px){
      .site-container{width:min(100% - 24px,var(--container))}
      .brand-text{max-width:190px}
      .dash-top{flex-direction:column;align-items:stretch}
      .dash-badge{text-align:center}
      .tag-row{flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px}
      .tag{flex:0 0 auto}
      .trust-card,.content-card,.bento-card,.problem-card,.testimonial-card{padding:20px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }

/* roulang page: category2 */
:root{
      --color-primary:#2563eb;
      --color-primary-strong:#1d4ed8;
      --color-sky:#0ea5e9;
      --color-sky-soft:#e0f2fe;
      --color-amber:#f59e0b;
      --color-bg:#f8fafc;
      --color-bg-soft:#f1f5f9;
      --color-card:#ffffff;
      --color-title:#0f172a;
      --color-text:#475569;
      --color-muted:#64748b;
      --color-border:#e2e8f0;
      --color-border-strong:#cbd5e1;
      --radius-sm:12px;
      --radius-md:16px;
      --radius-lg:22px;
      --radius-xl:30px;
      --shadow-sm:0 10px 26px rgba(15,23,42,.05);
      --shadow-md:0 12px 32px rgba(15,23,42,.06);
      --shadow-hover:0 18px 44px rgba(37,99,235,.12);
      --container:1200px;
      --transition:all .22s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--color-text);
      background:
        radial-gradient(circle at 10% 5%, rgba(224,242,254,.78), transparent 28%),
        linear-gradient(180deg,#ffffff 0%, var(--color-bg) 42%, #ffffff 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:var(--transition)}
    a:hover{color:var(--color-primary)}
    img,svg{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
      outline:3px solid rgba(37,99,235,.18);
      outline-offset:3px;
    }
    .site-container{
      width:min(100% - 40px,var(--container));
      margin-inline:auto;
    }
    .section{
      padding:88px 0;
      position:relative;
    }
    .section-tight{padding:64px 0}
    .section-title{
      max-width:760px;
      margin-bottom:34px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(224,242,254,.85);
      color:#0369a1;
      font-size:13px;
      font-weight:700;
      margin-bottom:14px;
      border:1px solid rgba(14,165,233,.16);
    }
    .eyebrow::before{
      content:"";
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--color-sky);
      box-shadow:0 0 0 5px rgba(14,165,233,.12);
    }
    h1,h2,h3,h4{
      color:var(--color-title);
      margin:0;
      letter-spacing:-.02em;
    }
    h1{
      font-size:clamp(34px,5vw,54px);
      line-height:1.14;
      font-weight:800;
    }
    h2{
      font-size:clamp(26px,3.2vw,36px);
      line-height:1.25;
      font-weight:800;
    }
    h3{
      font-size:21px;
      line-height:1.35;
      font-weight:750;
    }
    p{margin:0}
    .lead{
      font-size:18px;
      color:var(--color-text);
      line-height:1.85;
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      background:rgba(255,255,255,.9);
      backdrop-filter:blur(16px);
      border-bottom:1px solid rgba(226,232,240,.82);
    }
    .site-header .navbar{
      min-height:76px;
      padding:0;
    }
    .site-header .site-container{
      display:flex;
      align-items:center;
      gap:22px;
    }
    .brand-wrap{
      display:inline-flex;
      align-items:center;
      gap:10px;
      min-width:0;
      color:var(--color-title);
      font-weight:800;
    }
    .brand-icon{
      width:38px;
      height:38px;
      flex:0 0 38px;
      border-radius:14px;
      background:
        linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
      box-shadow:0 10px 24px rgba(37,99,235,.22);
      position:relative;
      overflow:hidden;
    }
    .brand-icon::before{
      content:"";
      position:absolute;
      inset:9px;
      border-radius:8px;
      background:
        linear-gradient(90deg,rgba(255,255,255,.92) 2px,transparent 2px) 0 0/7px 7px,
        linear-gradient(rgba(255,255,255,.55) 2px,transparent 2px) 0 0/7px 7px;
      opacity:.8;
    }
    .brand-text{
      max-width:250px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
      font-size:17px;
      letter-spacing:-.01em;
    }
    .navbar-toggler{
      border:1px solid var(--color-border);
      border-radius:12px;
      padding:8px 10px;
      box-shadow:none!important;
      background:#fff;
    }
    .navbar-nav{
      gap:6px;
      align-items:center;
    }
    .nav-link{
      color:#334155;
      font-weight:700;
      font-size:15px;
      padding:10px 14px!important;
      border-radius:999px;
    }
    .nav-link:hover{
      background:#f1f5f9;
      color:var(--color-primary);
    }
    .nav-link.active{
      background:rgba(37,99,235,.09);
      color:var(--color-primary);
    }
    .nav-actions{
      display:flex;
      align-items:center;
      gap:12px;
      margin-left:auto;
    }
    .command-search{
      height:42px;
      display:flex;
      align-items:center;
      gap:9px;
      color:#64748b;
      font-size:13px;
      padding:0 12px;
      border-radius:999px;
      background:#f8fafc;
      border:1px solid var(--color-border);
      min-width:238px;
      transition:var(--transition);
      cursor:default;
    }
    .command-search:hover{
      border-color:rgba(37,99,235,.28);
      background:#fff;
      box-shadow:var(--shadow-sm);
    }
    .kbd{
      margin-left:auto;
      font-size:12px;
      line-height:1;
      padding:5px 7px;
      border-radius:8px;
      color:#475569;
      background:#fff;
      border:1px solid var(--color-border);
      box-shadow:0 2px 0 rgba(15,23,42,.04);
    }
    .btn-brand,.btn-soft,.btn-line{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:44px;
      padding:11px 18px;
      border-radius:999px;
      font-weight:800;
      border:1px solid transparent;
      transition:var(--transition);
      white-space:nowrap;
    }
    .btn-brand{
      background:linear-gradient(135deg,var(--color-primary),var(--color-sky));
      color:#fff!important;
      box-shadow:0 12px 24px rgba(37,99,235,.22);
    }
    .btn-brand:hover{
      transform:translateY(-2px);
      box-shadow:0 18px 34px rgba(37,99,235,.28);
      background:linear-gradient(135deg,var(--color-primary-strong),#0284c7);
    }
    .btn-soft{
      background:#fff;
      color:var(--color-primary)!important;
      border-color:rgba(37,99,235,.18);
      box-shadow:0 8px 22px rgba(15,23,42,.04);
    }
    .btn-soft:hover{
      background:#eff6ff;
      transform:translateY(-2px);
      border-color:rgba(37,99,235,.34);
    }
    .btn-line{
      min-height:38px;
      padding:8px 13px;
      border-color:var(--color-border);
      background:#fff;
      color:#334155;
      font-size:14px;
    }
    .btn-line:hover,.btn-line.active{
      background:rgba(37,99,235,.08);
      color:var(--color-primary);
      border-color:rgba(37,99,235,.25);
    }
    .breadcrumb-soft{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      color:#64748b;
      font-size:14px;
      margin-bottom:20px;
    }
    .breadcrumb-soft a{
      color:#475569;
      font-weight:700;
    }
    .breadcrumb-soft span:last-child{
      color:var(--color-primary);
      font-weight:800;
    }
    .hero-update{
      padding:70px 0 54px;
      background:
        linear-gradient(135deg,rgba(224,242,254,.62),rgba(255,255,255,.95) 44%,rgba(241,245,249,.78)),
        radial-gradient(circle at 85% 18%,rgba(37,99,235,.13),transparent 28%);
      border-bottom:1px solid rgba(226,232,240,.7);
    }
    .hero-shell{
      display:grid;
      grid-template-columns:minmax(0,1.12fr) minmax(330px,.88fr);
      gap:34px;
      align-items:center;
    }
    .hero-copy{
      max-width:720px;
    }
    .hero-copy .lead{
      margin-top:20px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:28px;
    }
    .hero-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:22px;
    }
    .tag{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:7px 12px;
      border-radius:999px;
      font-size:13px;
      font-weight:750;
      color:#475569;
      background:#fff;
      border:1px solid var(--color-border);
      box-shadow:0 7px 18px rgba(15,23,42,.04);
    }
    .tag.blue{color:#1d4ed8;background:#eff6ff;border-color:#bfdbfe}
    .tag.cyan{color:#0369a1;background:#ecfeff;border-color:#bae6fd}
    .tag.amber{color:#92400e;background:#fffbeb;border-color:#fde68a}
    .tool-panel{
      background:rgba(255,255,255,.94);
      border:1px solid rgba(203,213,225,.72);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow-md);
      padding:22px;
      position:relative;
      overflow:hidden;
    }
    .tool-panel::after{
      content:"";
      position:absolute;
      width:180px;
      height:180px;
      right:-72px;
      top:-82px;
      background:radial-gradient(circle,rgba(14,165,233,.16),transparent 68%);
    }
    .panel-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      margin-bottom:18px;
      position:relative;
      z-index:1;
    }
    .panel-title{
      color:var(--color-title);
      font-weight:850;
    }
    .status-dot{
      display:inline-flex;
      align-items:center;
      gap:7px;
      color:#0f766e;
      font-size:13px;
      font-weight:800;
      background:#f0fdfa;
      border:1px solid #99f6e4;
      padding:6px 10px;
      border-radius:999px;
    }
    .status-dot::before{
      content:"";
      width:8px;height:8px;border-radius:50%;
      background:#14b8a6;
      box-shadow:0 0 0 4px rgba(20,184,166,.12);
    }
    .quick-search{
      display:flex;
      align-items:center;
      gap:10px;
      height:50px;
      border:1px solid var(--color-border);
      border-radius:16px;
      background:#f8fafc;
      padding:0 14px;
      color:#64748b;
      position:relative;
      z-index:1;
    }
    .filter-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:12px;
      margin-top:16px;
      position:relative;
      z-index:1;
    }
    .mini-stat{
      border:1px solid var(--color-border);
      background:linear-gradient(180deg,#fff,#f8fafc);
      border-radius:18px;
      padding:16px;
    }
    .mini-stat strong{
      display:block;
      color:var(--color-title);
      font-size:24px;
      line-height:1.1;
    }
    .mini-stat span{
      color:#64748b;
      font-size:13px;
      font-weight:650;
    }
    .timeline-wrap{
      display:grid;
      grid-template-columns:280px minmax(0,1fr);
      gap:30px;
      align-items:start;
    }
    .date-rail{
      position:sticky;
      top:102px;
      background:#fff;
      border:1px solid var(--color-border);
      border-radius:var(--radius-lg);
      padding:18px;
      box-shadow:var(--shadow-sm);
    }
    .date-rail-title{
      color:var(--color-title);
      font-weight:850;
      margin-bottom:12px;
    }
    .date-link{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      padding:12px 12px;
      border-radius:14px;
      color:#475569;
      font-weight:750;
      border:1px solid transparent;
    }
    .date-link:hover,.date-link.active{
      color:var(--color-primary);
      background:#eff6ff;
      border-color:#bfdbfe;
    }
    .date-count{
      font-size:12px;
      color:#64748b;
      background:#fff;
      border:1px solid var(--color-border);
      border-radius:999px;
      padding:2px 8px;
    }
    .timeline{
      position:relative;
      padding-left:28px;
    }
    .timeline::before{
      content:"";
      position:absolute;
      left:9px;
      top:8px;
      bottom:8px;
      width:2px;
      background:linear-gradient(180deg,#bfdbfe,#e2e8f0);
    }
    .timeline-group{
      position:relative;
      margin-bottom:26px;
    }
    .timeline-node{
      position:absolute;
      left:-27px;
      top:7px;
      width:20px;
      height:20px;
      border-radius:50%;
      background:var(--color-primary);
      border:5px solid #dbeafe;
      box-shadow:0 0 0 5px rgba(37,99,235,.08);
    }
    .batch-label{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:12px;
    }
    .batch-label h2{
      font-size:24px;
    }
    .batch-label .tag{
      box-shadow:none;
    }
    .update-card{
      background:#fff;
      border:1px solid var(--color-border);
      border-radius:var(--radius-lg);
      padding:24px;
      box-shadow:var(--shadow-sm);
      margin-bottom:14px;
      transition:var(--transition);
    }
    .update-card:hover{
      transform:translateY(-3px);
      border-color:rgba(37,99,235,.28);
      box-shadow:var(--shadow-hover);
    }
    .update-meta{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:12px;
    }
    .badge-soft{
      display:inline-flex;
      align-items:center;
      border-radius:999px;
      padding:5px 10px;
      font-size:12px;
      font-weight:800;
      border:1px solid transparent;
    }
    .badge-soft.primary{color:#1d4ed8;background:#eff6ff;border-color:#bfdbfe}
    .badge-soft.cyan{color:#0369a1;background:#ecfeff;border-color:#bae6fd}
    .badge-soft.amber{color:#92400e;background:#fffbeb;border-color:#fde68a}
    .badge-soft.gray{color:#475569;background:#f8fafc;border-color:#e2e8f0}
    .update-card h3{
      margin-bottom:8px;
    }
    .update-card p{
      color:#64748b;
      margin-bottom:16px;
    }
    .update-foot{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      padding-top:14px;
      border-top:1px dashed var(--color-border);
    }
    .update-time{
      font-size:13px;
      color:#64748b;
      font-weight:700;
    }
    .text-link{
      color:var(--color-primary);
      font-weight:850;
      display:inline-flex;
      align-items:center;
      gap:6px;
    }
    .text-link:hover{
      gap:10px;
      color:var(--color-primary-strong);
    }
    .compare-section{
      background:linear-gradient(180deg,#f8fafc,#fff);
      border-block:1px solid rgba(226,232,240,.65);
    }
    .compare-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:16px;
    }
    .mode-card{
      background:#fff;
      border:1px solid var(--color-border);
      border-radius:var(--radius-lg);
      padding:24px;
      box-shadow:var(--shadow-sm);
      transition:var(--transition);
    }
    .mode-card:hover{
      transform:translateY(-3px);
      box-shadow:var(--shadow-hover);
      border-color:rgba(37,99,235,.28);
    }
    .mode-icon{
      width:44px;
      height:44px;
      display:grid;
      place-items:center;
      border-radius:16px;
      color:var(--color-primary);
      background:linear-gradient(135deg,#eff6ff,#e0f2fe);
      font-weight:900;
      margin-bottom:14px;
    }
    .mode-card h3{
      margin-bottom:9px;
    }
    .mode-card ul{
      list-style:none;
      padding:0;
      margin:14px 0 0;
      display:grid;
      gap:8px;
    }
    .mode-card li{
      display:flex;
      gap:8px;
      color:#64748b;
      font-size:14px;
    }
    .mode-card li::before{
      content:"✓";
      color:var(--color-primary);
      font-weight:900;
    }
    .feedback-grid{
      display:grid;
      grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);
      gap:28px;
      align-items:stretch;
    }
    .info-card,.form-card,.faq-card,.cta-card{
      background:#fff;
      border:1px solid var(--color-border);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow-md);
    }
    .info-card{
      padding:30px;
      background:
        radial-gradient(circle at 90% 0%,rgba(14,165,233,.13),transparent 35%),
        #fff;
    }
    .info-list{
      display:grid;
      gap:14px;
      margin-top:24px;
    }
    .info-item{
      display:flex;
      gap:13px;
      padding:16px;
      border-radius:18px;
      background:#f8fafc;
      border:1px solid var(--color-border);
    }
    .info-item strong{
      display:block;
      color:var(--color-title);
      margin-bottom:3px;
    }
    .info-item span{
      color:#64748b;
      font-size:14px;
    }
    .check-icon{
      width:26px;height:26px;flex:0 0 26px;
      display:grid;place-items:center;
      border-radius:999px;
      background:#dbeafe;
      color:var(--color-primary);
      font-weight:900;
      margin-top:2px;
    }
    .form-card{
      padding:30px;
    }
    .form-label{
      color:var(--color-title);
      font-weight:800;
      margin-bottom:8px;
    }
    .form-control,.form-select{
      min-height:50px;
      border-radius:16px;
      border-color:var(--color-border);
      background:#f8fafc;
      color:#334155;
      box-shadow:none!important;
      transition:var(--transition);
    }
    textarea.form-control{min-height:128px}
    .form-control:focus,.form-select:focus{
      border-color:rgba(37,99,235,.5);
      background:#fff;
      box-shadow:0 0 0 4px rgba(37,99,235,.1)!important;
    }
    .form-text{
      color:#64748b;
      font-size:13px;
    }
    .faq-wrap{
      max-width:920px;
      margin-inline:auto;
    }
    .accordion{
      display:grid;
      gap:14px;
    }
    .accordion-item{
      border:1px solid var(--color-border)!important;
      border-radius:20px!important;
      overflow:hidden;
      box-shadow:var(--shadow-sm);
      background:#fff;
    }
    .accordion-button{
      padding:20px 22px;
      color:var(--color-title);
      font-weight:850;
      background:#fff;
      box-shadow:none!important;
      border-radius:20px!important;
    }
    .accordion-button:not(.collapsed){
      color:var(--color-primary);
      background:#eff6ff;
    }
    .accordion-button::after{
      width:18px;
      height:18px;
      background-size:18px;
      filter:saturate(.4);
      transition:transform .22s ease;
    }
    .accordion-body{
      padding:0 22px 22px;
      color:#64748b;
      line-height:1.85;
      background:#fff;
    }
    .cta-card{
      padding:34px;
      display:grid;
      grid-template-columns:minmax(0,1fr) auto;
      gap:24px;
      align-items:center;
      overflow:hidden;
      background:
        radial-gradient(circle at 8% 20%,rgba(255,255,255,.9),transparent 24%),
        linear-gradient(135deg,#eff6ff,#ffffff 52%,#e0f2fe);
    }
    .cta-card p{
      margin-top:10px;
      max-width:720px;
      color:#475569;
    }
    .cta-actions{
      display:flex;
      gap:12px;
      flex-wrap:wrap;
      justify-content:flex-end;
    }
    .site-footer{
      background:#f1f5f9;
      border-top:1px solid var(--color-border);
      padding:54px 0 26px;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.35fr .8fr .8fr;
      gap:42px;
      align-items:start;
    }
    .footer-grid p{
      max-width:460px;
      color:#64748b;
    }
    .footer-title{
      color:var(--color-title);
      font-weight:850;
      margin-bottom:13px;
    }
    .footer-links{
      display:grid;
      gap:10px;
    }
    .footer-links a{
      color:#64748b;
      font-weight:700;
    }
    .footer-links a:hover{
      color:var(--color-primary);
      transform:translateX(3px);
    }
    .copyright{
      border-top:1px solid var(--color-border);
      margin-top:34px;
      padding-top:20px;
      display:flex;
      justify-content:space-between;
      gap:16px;
      color:#64748b;
      font-size:13px;
      flex-wrap:wrap;
    }
    @media (max-width:1199px){
      .command-search{min-width:200px}
      .compare-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .timeline-wrap{grid-template-columns:240px minmax(0,1fr)}
    }
    @media (max-width:991px){
      .site-header .site-container{
        width:min(100% - 28px,var(--container));
        flex-wrap:wrap;
        padding:12px 0;
      }
      .navbar-collapse{
        width:100%;
        padding:16px 0 4px;
      }
      .navbar-nav{
        align-items:stretch;
        gap:8px;
      }
      .nav-link{
        display:block;
      }
      .nav-actions{
        margin-left:0;
        flex-direction:column;
        align-items:stretch;
        width:100%;
        margin-top:12px;
      }
      .command-search{
        width:100%;
        min-width:0;
      }
      .nav-actions .btn-brand{
        width:100%;
      }
      .hero-shell,.feedback-grid,.cta-card{
        grid-template-columns:1fr;
      }
      .timeline-wrap{
        grid-template-columns:1fr;
      }
      .date-rail{
        position:relative;
        top:auto;
      }
      .date-rail .date-list{
        display:flex;
        overflow-x:auto;
        gap:10px;
        padding-bottom:4px;
      }
      .date-link{
        min-width:158px;
      }
      .cta-actions{
        justify-content:flex-start;
      }
      .footer-grid{
        grid-template-columns:1fr 1fr;
      }
      .footer-grid>div:first-child{
        grid-column:1/-1;
      }
    }
    @media (max-width:767px){
      .site-container{width:min(100% - 28px,var(--container))}
      .section{padding:62px 0}
      .section-tight{padding:48px 0}
      .hero-update{padding:44px 0 42px}
      .lead{font-size:16px}
      .hero-actions .btn-brand,.hero-actions .btn-soft,.cta-actions .btn-brand,.cta-actions .btn-soft{
        width:100%;
      }
      .filter-grid,.compare-grid{
        grid-template-columns:1fr;
      }
      .timeline{
        padding-left:22px;
      }
      .timeline-node{
        left:-25px;
      }
      .batch-label{
        align-items:flex-start;
        flex-direction:column;
      }
      .update-foot{
        align-items:flex-start;
        flex-direction:column;
      }
      .info-card,.form-card,.cta-card{
        padding:24px;
        border-radius:24px;
      }
      .footer-grid{
        grid-template-columns:1fr;
        gap:28px;
      }
      .copyright{
        flex-direction:column;
      }
    }
    @media (max-width:520px){
      .brand-text{max-width:190px;font-size:15px}
      .brand-icon{width:34px;height:34px;flex-basis:34px;border-radius:12px}
      .tool-panel{padding:18px;border-radius:24px}
      .update-card{padding:20px;border-radius:20px}
      .hero-tags{
        flex-wrap:nowrap;
        overflow-x:auto;
        padding-bottom:4px;
      }
      .tag{white-space:nowrap}
    }

/* roulang page: category1 */
:root {
      --brand: #2563eb;
      --brand-dark: #1d4ed8;
      --brand-soft: #dbeafe;
      --sky: #0ea5e9;
      --sky-soft: #e0f2fe;
      --amber: #f59e0b;
      --amber-soft: #fef3c7;
      --bg: #f8fafc;
      --bg-soft: #f1f5f9;
      --surface: #ffffff;
      --surface-blue: #f6fbff;
      --text: #0f172a;
      --muted: #475569;
      --weak: #64748b;
      --line: #e2e8f0;
      --line-blue: rgba(37, 99, 235, .18);
      --shadow: 0 12px 32px rgba(15, 23, 42, .06);
      --shadow-hover: 0 18px 44px rgba(37, 99, 235, .12);
      --radius-sm: 12px;
      --radius-md: 16px;
      --radius-lg: 22px;
      --radius-xl: 30px;
      --container: 1200px;
      --header-h: 76px;
      --ease: all .24s ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      overflow-x: hidden;
    }

    body {
      margin: 0;
      min-width: 320px;
      color: var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(14, 165, 233, .10), transparent 30%),
        radial-gradient(circle at 88% 12%, rgba(37, 99, 235, .08), transparent 28%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 42%, #ffffff 100%);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--ease);
    }

    img, svg {
      max-width: 100%;
      display: block;
    }

    button,
    input,
    select,
    textarea {
      font: inherit;
    }

    button:focus-visible,
    a:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible {
      outline: 3px solid rgba(37, 99, 235, .22);
      outline-offset: 3px;
    }

    .site-container {
      width: min(100% - 40px, var(--container));
      margin-inline: auto;
    }

    .section {
      padding: 86px 0;
    }

    .section-tight {
      padding: 64px 0;
    }

    .section-head {
      max-width: 760px;
      margin-bottom: 34px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      background: var(--sky-soft);
      color: var(--brand-dark);
      border: 1px solid rgba(14, 165, 233, .18);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .02em;
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: var(--sky);
      box-shadow: 0 0 0 4px rgba(14, 165, 233, .13);
    }

    h1, h2, h3, h4, p {
      margin-top: 0;
    }

    h1 {
      font-size: clamp(34px, 5vw, 52px);
      line-height: 1.15;
      letter-spacing: -.035em;
      font-weight: 800;
      margin-bottom: 22px;
    }

    h2 {
      font-size: clamp(26px, 3.4vw, 38px);
      line-height: 1.25;
      letter-spacing: -.025em;
      font-weight: 800;
      margin-bottom: 14px;
    }

    h3 {
      font-size: 21px;
      line-height: 1.35;
      font-weight: 750;
      margin-bottom: 10px;
    }

    p {
      color: var(--muted);
      font-size: 16px;
      margin-bottom: 0;
    }

    .lead {
      font-size: 18px;
      color: var(--muted);
      max-width: 760px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255, 255, 255, .88);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(226, 232, 240, .9);
    }

    .site-header .navbar {
      min-height: var(--header-h);
      padding: 0;
    }

    .site-header .site-container {
      display: flex;
      align-items: center;
      width: min(100% - 40px, var(--container));
    }

    .brand-wrap {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      min-width: 0;
    }

    .brand-icon {
      position: relative;
      flex: 0 0 auto;
      width: 38px;
      height: 38px;
      border-radius: 14px;
      background: linear-gradient(135deg, var(--brand), var(--sky));
      box-shadow: 0 10px 24px rgba(37, 99, 235, .22);
      overflow: hidden;
    }

    .brand-icon::before,
    .brand-icon::after {
      content: "";
      position: absolute;
      border-radius: 999px;
      background: rgba(255, 255, 255, .82);
    }

    .brand-icon::before {
      width: 17px;
      height: 4px;
      left: 10px;
      top: 12px;
      box-shadow: 0 7px 0 rgba(255, 255, 255, .55);
    }

    .brand-icon::after {
      width: 6px;
      height: 6px;
      right: 8px;
      bottom: 9px;
    }

    .brand-text {
      color: var(--text);
      font-weight: 800;
      letter-spacing: -.03em;
      font-size: 17px;
      white-space: nowrap;
      max-width: 260px;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .navbar-toggler {
      border: 1px solid var(--line);
      border-radius: 12px;
      padding: 8px 10px;
      box-shadow: none !important;
      background-color: #fff;
    }

    .navbar-toggler:focus {
      box-shadow: 0 0 0 4px rgba(37, 99, 235, .14) !important;
    }

    .navbar-collapse {
      align-items: center;
    }

    .navbar-nav {
      gap: 6px;
    }

    .nav-link {
      color: var(--weak);
      font-size: 15px;
      font-weight: 700;
      padding: 9px 14px !important;
      border-radius: 999px;
    }

    .nav-link:hover {
      color: var(--brand);
      background: rgba(37, 99, 235, .07);
    }

    .nav-link.active {
      color: var(--brand-dark) !important;
      background: var(--brand-soft);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: auto;
    }

    .command-search {
      min-width: 250px;
      height: 42px;
      padding: 0 10px 0 14px;
      border-radius: 999px;
      background: #f1f5f9;
      border: 1px solid rgba(226, 232, 240, .9);
      color: var(--weak);
      display: flex;
      align-items: center;
      gap: 9px;
      font-size: 13px;
      transition: var(--ease);
      cursor: default;
    }

    .command-search:hover {
      border-color: rgba(37, 99, 235, .24);
      background: #fff;
      box-shadow: 0 10px 24px rgba(15, 23, 42, .06);
    }

    .kbd {
      margin-left: auto;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 24px;
      padding: 0 8px;
      border-radius: 8px;
      background: #fff;
      border: 1px solid var(--line);
      color: var(--weak);
      font-size: 12px;
      font-weight: 700;
      box-shadow: 0 1px 0 rgba(15, 23, 42, .04);
    }

    .btn-brand,
    .btn-ghost,
    .btn-soft {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 11px 18px;
      border-radius: 999px;
      font-weight: 800;
      font-size: 15px;
      border: 1px solid transparent;
      transition: var(--ease);
      white-space: nowrap;
    }

    .btn-brand {
      color: #fff;
      background: linear-gradient(135deg, var(--brand), var(--sky));
      box-shadow: 0 14px 28px rgba(37, 99, 235, .22);
    }

    .btn-brand:hover,
    .btn-brand:focus {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 18px 38px rgba(37, 99, 235, .28);
      filter: saturate(1.06);
    }

    .btn-ghost {
      color: var(--brand-dark);
      background: #fff;
      border-color: rgba(37, 99, 235, .18);
    }

    .btn-ghost:hover {
      color: var(--brand-dark);
      background: var(--brand-soft);
      transform: translateY(-2px);
      border-color: rgba(37, 99, 235, .28);
    }

    .btn-soft {
      color: var(--brand-dark);
      background: var(--brand-soft);
      border-color: rgba(37, 99, 235, .10);
    }

    .btn-soft:hover {
      background: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow);
    }

    .breadcrumb-wrap {
      padding-top: 28px;
    }

    .breadcrumb-lite {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
      color: var(--weak);
      font-size: 14px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .breadcrumb-lite a {
      color: var(--weak);
    }

    .breadcrumb-lite a:hover {
      color: var(--brand);
    }

    .breadcrumb-lite .current {
      color: var(--brand-dark);
      font-weight: 700;
    }

    .category-hero {
      padding: 52px 0 70px;
    }

    .hero-shell {
      position: relative;
      overflow: hidden;
      border: 1px solid var(--line-blue);
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(255, 255, 255, .96), rgba(240, 249, 255, .94)),
        radial-gradient(circle at 80% 15%, rgba(14, 165, 233, .18), transparent 30%);
      box-shadow: var(--shadow);
      padding: 38px;
    }

    .hero-shell::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(37, 99, 235, .055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, .055) 1px, transparent 1px);
      background-size: 28px 28px;
      mask-image: linear-gradient(120deg, transparent 0%, #000 36%, transparent 100%);
      pointer-events: none;
    }

    .hero-shell > .row {
      position: relative;
      z-index: 1;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
    }

    .filter-panel {
      background: rgba(255, 255, 255, .86);
      border: 1px solid rgba(226, 232, 240, .92);
      border-radius: 26px;
      padding: 22px;
      box-shadow: 0 18px 48px rgba(15, 23, 42, .08);
    }

    .search-large {
      display: flex;
      align-items: center;
      gap: 10px;
      min-height: 52px;
      padding: 0 14px;
      border-radius: 18px;
      background: var(--bg);
      border: 1px solid var(--line);
      color: var(--weak);
      margin-bottom: 16px;
      transition: var(--ease);
    }

    .search-large:hover {
      background: #fff;
      border-color: rgba(37, 99, 235, .25);
      box-shadow: 0 10px 24px rgba(37, 99, 235, .08);
    }

    .filter-chip-row {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
    }

    .chip,
    .tag,
    .meta-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border-radius: 999px;
      font-weight: 750;
      line-height: 1;
      white-space: nowrap;
    }

    .chip {
      padding: 10px 12px;
      font-size: 13px;
      color: var(--brand-dark);
      background: #fff;
      border: 1px solid rgba(37, 99, 235, .16);
      cursor: pointer;
      transition: var(--ease);
    }

    .chip:hover,
    .chip.active {
      color: #fff;
      background: var(--brand);
      border-color: var(--brand);
      transform: translateY(-1px);
    }

    .tag {
      padding: 7px 10px;
      font-size: 12px;
      color: var(--brand-dark);
      background: var(--brand-soft);
      border: 1px solid rgba(37, 99, 235, .10);
    }

    .tag.cyan {
      color: #036987;
      background: var(--sky-soft);
      border-color: rgba(14, 165, 233, .15);
    }

    .tag.amber {
      color: #92400e;
      background: var(--amber-soft);
      border-color: rgba(245, 158, 11, .18);
    }

    .tag.gray {
      color: var(--weak);
      background: #f8fafc;
      border-color: var(--line);
    }

    .hero-stat-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 18px;
    }

    .hero-stat {
      padding: 16px;
      border-radius: 18px;
      background: linear-gradient(180deg, #fff, #f8fafc);
      border: 1px solid var(--line);
    }

    .hero-stat strong {
      display: block;
      color: var(--text);
      font-size: 22px;
      line-height: 1.1;
      margin-bottom: 4px;
      letter-spacing: -.02em;
    }

    .hero-stat span {
      color: var(--weak);
      font-size: 13px;
      font-weight: 650;
    }

    .layout-filter {
      display: grid;
      grid-template-columns: 292px minmax(0, 1fr);
      gap: 26px;
      align-items: start;
    }

    .side-filter {
      position: sticky;
      top: calc(var(--header-h) + 20px);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      padding: 22px;
      background: rgba(255, 255, 255, .92);
      box-shadow: var(--shadow);
    }

    .side-filter h2 {
      font-size: 22px;
      margin-bottom: 6px;
    }

    .filter-group {
      padding-top: 20px;
      margin-top: 20px;
      border-top: 1px solid var(--line);
    }

    .filter-title {
      font-size: 14px;
      color: var(--text);
      font-weight: 800;
      margin-bottom: 12px;
    }

    .filter-list {
      display: grid;
      gap: 9px;
    }

    .filter-btn {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: #fff;
      color: var(--muted);
      padding: 10px 12px;
      text-align: left;
      font-weight: 700;
      transition: var(--ease);
    }

    .filter-btn:hover,
    .filter-btn.active {
      border-color: rgba(37, 99, 235, .30);
      background: var(--brand-soft);
      color: var(--brand-dark);
      transform: translateX(2px);
    }

    .hint-box {
      padding: 14px;
      border-radius: 16px;
      background: linear-gradient(135deg, var(--sky-soft), #fff);
      color: var(--muted);
      font-size: 14px;
      border: 1px solid rgba(14, 165, 233, .14);
    }

    .content-toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 18px;
      padding: 16px;
      border-radius: 20px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: 0 10px 28px rgba(15, 23, 42, .04);
    }

    .toolbar-title {
      font-weight: 800;
      color: var(--text);
    }

    .toolbar-title span {
      color: var(--brand);
    }

    .sort-select {
      width: auto;
      min-width: 156px;
      border-radius: 14px;
      border-color: var(--line);
      color: var(--muted);
      font-weight: 700;
      padding: 10px 36px 10px 13px;
      box-shadow: none !important;
    }

    .sort-select:focus {
      border-color: rgba(37, 99, 235, .45);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, .12) !important;
    }

    .content-list {
      display: grid;
      gap: 16px;
    }

    .content-card {
      display: grid;
      grid-template-columns: 172px minmax(0, 1fr);
      gap: 20px;
      padding: 18px;
      border-radius: var(--radius-lg);
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: 0 10px 28px rgba(15, 23, 42, .04);
      transition: var(--ease);
    }

    .content-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(37, 99, 235, .28);
    }

    .thumb-abstract {
      position: relative;
      min-height: 132px;
      border-radius: 18px;
      overflow: hidden;
      background:
        radial-gradient(circle at 24% 22%, rgba(255, 255, 255, .92), transparent 18%),
        linear-gradient(135deg, rgba(37, 99, 235, .86), rgba(14, 165, 233, .58));
    }

    .thumb-abstract::before {
      content: "";
      position: absolute;
      left: 18px;
      right: 18px;
      top: 26px;
      height: 12px;
      border-radius: 999px;
      background: rgba(255, 255, 255, .74);
      box-shadow:
        0 24px 0 rgba(255, 255, 255, .46),
        0 48px 0 rgba(255, 255, 255, .30);
    }

    .thumb-abstract::after {
      content: "HD";
      position: absolute;
      right: 14px;
      bottom: 13px;
      padding: 6px 9px;
      border-radius: 999px;
      background: rgba(255, 255, 255, .88);
      color: var(--brand-dark);
      font-size: 12px;
      font-weight: 900;
      letter-spacing: .04em;
    }

    .card-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 12px;
    }

    .content-card p {
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .meta-line {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-top: 16px;
      color: var(--weak);
      font-size: 13px;
      font-weight: 700;
    }

    .arrow-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--brand);
      font-weight: 850;
      white-space: nowrap;
    }

    .arrow-link:hover {
      color: var(--brand-dark);
      transform: translateX(3px);
    }

    .topic-scroll {
      display: grid;
      grid-template-columns: 1.1fr .9fr .9fr;
      gap: 18px;
    }

    .topic-card {
      position: relative;
      min-height: 240px;
      padding: 26px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: var(--shadow);
      overflow: hidden;
      transition: var(--ease);
    }

    .topic-card.large {
      background:
        radial-gradient(circle at 90% 10%, rgba(14, 165, 233, .18), transparent 28%),
        linear-gradient(135deg, #ffffff, #eff6ff);
    }

    .topic-card::after {
      content: "";
      position: absolute;
      width: 160px;
      height: 160px;
      right: -56px;
      bottom: -62px;
      border-radius: 50%;
      background: rgba(37, 99, 235, .08);
    }

    .topic-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(37, 99, 235, .28);
    }

    .topic-card .tag {
      margin-bottom: 18px;
    }

    .topic-list {
      list-style: none;
      padding: 0;
      margin: 18px 0 0;
      display: grid;
      gap: 10px;
    }

    .topic-list li {
      display: flex;
      gap: 10px;
      color: var(--muted);
      font-weight: 650;
      font-size: 14px;
    }

    .topic-list li::before {
      content: "";
      flex: 0 0 auto;
      width: 8px;
      height: 8px;
      margin-top: 9px;
      border-radius: 999px;
      background: var(--brand);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, .10);
    }

    .steps-strip {
      border-radius: var(--radius-xl);
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: var(--shadow);
      padding: 26px;
    }

    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }

    .step-item {
      position: relative;
      padding: 20px;
      border-radius: 18px;
      background: var(--bg);
      border: 1px solid var(--line);
      min-height: 170px;
    }

    .step-num {
      display: inline-flex;
      width: 34px;
      height: 34px;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      background: var(--brand);
      color: #fff;
      font-weight: 900;
      margin-bottom: 14px;
      box-shadow: 0 10px 20px rgba(37, 99, 235, .18);
    }

    .step-item p {
      font-size: 14px;
    }

    .accordion {
      display: grid;
      gap: 12px;
    }

    .accordion-item {
      border: 1px solid var(--line) !important;
      border-radius: 18px !important;
      overflow: hidden;
      background: #fff;
      box-shadow: 0 10px 24px rgba(15, 23, 42, .04);
    }

    .accordion-button {
      padding: 18px 20px;
      color: var(--text);
      background: #fff;
      font-weight: 850;
      box-shadow: none !important;
    }

    .accordion-button:not(.collapsed) {
      color: var(--brand-dark);
      background: var(--surface-blue);
    }

    .accordion-button::after {
      width: 18px;
      height: 18px;
      background-size: 18px;
      transition: transform .22s ease;
    }

    .accordion-body {
      padding: 0 20px 20px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.8;
      background: var(--surface-blue);
    }

    .cta-band {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-xl);
      padding: 34px;
      background:
        radial-gradient(circle at 86% 18%, rgba(14, 165, 233, .18), transparent 28%),
        linear-gradient(135deg, #eff6ff, #ffffff);
      border: 1px solid var(--line-blue);
      box-shadow: var(--shadow);
    }

    .cta-band::after {
      content: "";
      position: absolute;
      right: -70px;
      bottom: -90px;
      width: 230px;
      height: 230px;
      border-radius: 999px;
      background: rgba(37, 99, 235, .08);
    }

    .cta-content {
      position: relative;
      z-index: 1;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .cta-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .site-footer {
      padding: 62px 0 28px;
      background: #f1f5f9;
      border-top: 1px solid var(--line);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr .8fr .8fr;
      gap: 34px;
      align-items: start;
    }

    .site-footer p {
      max-width: 420px;
      font-size: 15px;
      color: var(--weak);
    }

    .footer-title {
      font-size: 14px;
      font-weight: 900;
      color: var(--text);
      margin-bottom: 14px;
    }

    .footer-links {
      display: grid;
      gap: 10px;
    }

    .footer-links a {
      color: var(--weak);
      font-size: 15px;
      font-weight: 650;
    }

    .footer-links a:hover {
      color: var(--brand);
      transform: translateX(3px);
    }

    .copyright {
      margin-top: 34px;
      padding-top: 20px;
      border-top: 1px solid rgba(203, 213, 225, .85);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      color: var(--weak);
      font-size: 13px;
    }

    @media (max-width: 1199.98px) {
      .command-search {
        min-width: 210px;
      }

      .layout-filter {
        grid-template-columns: 260px minmax(0, 1fr);
        gap: 20px;
      }

      .topic-scroll {
        grid-template-columns: 1fr 1fr;
      }

      .topic-card.large {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 991.98px) {
      :root {
        --header-h: 68px;
      }

      .site-header .site-container {
        flex-wrap: wrap;
      }

      .navbar-collapse {
        width: 100%;
        padding: 14px 0 18px;
      }

      .navbar-nav {
        padding: 8px;
        border-radius: 18px;
        background: var(--bg);
        border: 1px solid var(--line);
      }

      .nav-actions {
        width: 100%;
        margin-left: 0;
        margin-top: 12px;
        display: grid;
        grid-template-columns: 1fr;
      }

      .command-search {
        width: 100%;
        min-width: 0;
      }

      .btn-brand {
        width: 100%;
      }

      .hero-shell {
        padding: 28px;
      }

      .filter-panel {
        margin-top: 26px;
      }

      .layout-filter {
        grid-template-columns: 1fr;
      }

      .side-filter {
        position: static;
      }

      .side-filter .filter-list {
        grid-template-columns: repeat(2, 1fr);
      }

      .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .cta-content {
        align-items: flex-start;
        flex-direction: column;
      }

      .cta-actions {
        justify-content: flex-start;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .footer-grid > div:first-child {
        grid-column: 1 / -1;
      }

      .copyright {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 767.98px) {
      .site-container {
        width: min(100% - 28px, var(--container));
      }

      .site-header .site-container {
        width: min(100% - 28px, var(--container));
      }

      .brand-text {
        max-width: 210px;
        font-size: 16px;
      }

      .section {
        padding: 62px 0;
      }

      .section-tight {
        padding: 48px 0;
      }

      .category-hero {
        padding: 34px 0 52px;
      }

      .hero-shell {
        border-radius: 24px;
        padding: 24px;
      }

      .hero-actions .btn-brand,
      .hero-actions .btn-ghost {
        width: 100%;
      }

      .hero-stat-grid {
        grid-template-columns: 1fr;
      }

      .content-toolbar {
        align-items: stretch;
        flex-direction: column;
      }

      .sort-select {
        width: 100%;
      }

      .content-card {
        grid-template-columns: 1fr;
      }

      .thumb-abstract {
        min-height: 150px;
      }

      .meta-line {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
      }

      .topic-scroll {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        padding-bottom: 8px;
        margin-inline: -14px;
        padding-inline: 14px;
      }

      .topic-card {
        min-width: 82%;
        scroll-snap-align: start;
      }

      .side-filter .filter-list {
        grid-template-columns: 1fr;
      }

      .step-grid {
        grid-template-columns: 1fr;
      }

      .cta-band {
        padding: 26px;
      }

      .cta-actions,
      .cta-actions a {
        width: 100%;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 575.98px) {
      h1 {
        font-size: 34px;
      }

      h2 {
        font-size: 26px;
      }

      .brand-icon {
        width: 34px;
        height: 34px;
        border-radius: 12px;
      }

      .brand-text {
        max-width: 176px;
      }

      .filter-panel,
      .side-filter,
      .steps-strip {
        padding: 18px;
        border-radius: 20px;
      }

      .chip {
        padding: 9px 10px;
      }

      .topic-card {
        min-width: 88%;
        padding: 22px;
      }
    }